view crystal in whole frame

Atomic Positional Parameters
C1 2a 0.0000 0.0000 0.0000
C2 2b 0.3333 0.6667 0.0050

Reference
O. Hassel (1924) Zeitschrift fuer Physik, 25 317

Mineral Chemistry
A polymorph of carbon, graphite consists of planar sheets formed from three-coordinated carbon atoms. Intra-planar bonding is very strong, but forces holding these sheets together are weak. Graphite, formed by metamorphism of organic carbonaceous material, is commonly found in metamorphic rocks such as metamorphosed limestones, schists and gneisses. Graphite may also be found in hydrothermal veins, in igneous rocks, and in some iron meteorites.

The CHIME figure shows the sheet-like structure of graphite, with the unit cell outlined.